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토마토 대목품종의 풋마름병 저항성과 접목 적합성

Resistance to Bacterial Wilt of Rootstock Varieties of Tomato and Graft Compatibility

  • Lee, Young Ju (Department of Horticulture, Kyungpook National University) ;
  • Kim, Byung-Soo (Department of Horticulture, Kyungpook National University)
  • 투고 : 2017.03.20
  • 심사 : 2017.05.08
  • 발행 : 2017.09.30

초록

시중에 판매되는 대목품종 6종에 대하여 유묘의 뿌리를 병원세균 현탁액에 침지하는 방법으로 접종하여 풋마름병에 대한 저항성을 검정한 결과 저항성에서 '신청강'이 최고이고 'B-블로킹'이 다음이었다. 이들 6종 대목 품종에 '도태랑'을 접목한 묘를 대목에서와 같은 방법으로 풋마름병균을 접종하여 비닐하우스와 노지 포장에 재배하여 풋마름병 발생을 조사하였다. 결과 대목 검정에서와 같이 접목 식물에서도 '신청강' 접목 식물에서 풋마름병 발생이 가장 적었으며, '울트라', '파이팅', 'B블로킹', '스페셜', '커넥션' 접목묘의 순으로 낮은 발병도를 보였다. 접목묘의 발병도는 대목의 발병도, 즉 저항성과 대체로 일치하였다. 무접종 접목묘를 정상적 조건에서 재배하여 대목별 수량 반응을 조사한 결과 접수 토마토의 개화일수와 수량, 그리고 과실의 크기와 당도에 미치는 대목의 영향은 미미하거나 차이가 없었다. 접목묘와 함께 대목품종을 재배하여 대목의 개화일수 등 원예적 형질과 접수 식물의 당해 원예적 형질간의 상관을 분석한 결과 개화일수와 과고에서만 유의의한 부의 상관이 관찰되어 대목의 원예적 형질이 접수의 원예적 형질에 직접적으로 영향을 주지는 않는 것으로 나타났다. 따라서 토마토 풋마름병의 효과적 방제와 수량증대를 위해서는 높은 수준의 저항성과 접수의 생육과 수량을 지원하는 능력이 우수한 품종의 선발 보급이 필요하다.

Six commercial rootstock varieties were tested for resistance to bacterial wilt (Ralstonia solanacearum) by dipping the roots of seedlings in the bacterial suspension at seedling stage. 'Shincheonggang' and 'B-Blocking' ranked top and second in resistance to bacterial wilt, respectively. For disease index of the grafted plants, 'Dotaerang' grafted onto 'Shincheonggang' was the least, followed by 'Ultra', 'Fighting', 'B-Blocking', 'Special', and 'Connection' grafts. Thus, disease development on the grafted plants was correlated with resistance of rootstocks. The effect of rootstocks on horticultural characteristics including days to flower of scion was minimum or negligible. In correlation between horticultural characteristics of rootstocks and scions grafted thereon, statistically significant negative correlation was observed in days to flower and fruit height but no significant correlation was observed in yield per plant, fruit diameter and soluble solid content in the fruits. Thus, selection of resistant rootstock varieties that support the growth and yield of scion well is necessary for effective control of the disease and yield increase.

키워드

참고문헌

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